Chandrayan 3 TDD kata Chandrayaan3 spacecraft moves through commands where 'f' command makes it move 1 step forward 'b' command makes it move 1 step backward 'l','r','u','d' are direction changing commands that make the spacecraft face left, right, up, down at current position respectively. the current positon of the spacecraft is denoted by x,y,z co-ordinates where 'x' represents movement towards east or west 'y' represents movement towards north or south 'z' represents movement towards up or down.